Question

We call a number special if every digit in the number either is a 1 or borders a 1. How many 5-digit numbers are special?

Answer 1

By bordering a 1, do you mean 0 and 2?
If so, you need to find how many different 5-digit numbers you can make with the digits 0, 1, and 2.

Answer 2

My life will forever be confused if I dont find out the answer.

Answer 3

The number of permutations of n different things taken r at a time with repetitions is\[n ^{k}\]
In this case the number of different 5-digit numbers is
\[3^{5}=you\ can\ calculate\]